/**
 * 系统自定义业务异常检测类
 * 直接copy google guava
 * 将异常更改为业务异常，由系统全局拦截自定义业务异常，并进行处理
 */

package com.example.demo2.common.check;

import javax.annotation.Nullable;

import com.example.demo2.common.exceptions.BusinessAssertException;
import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Verify;

import cn.hutool.core.util.StrUtil;

/**
 * Static convenience methods that help a method or constructor check whether it
 * was invoked
 * correctly (whether its <i>preconditions</i> have been met). These methods
 * generally accept a
 * {@code boolean} expression which is expected to be {@code true} (or in the
 * case of {@code
 * checkNotNull}, an object reference which is expected to be non-null). When
 * {@code false} (or
 * {@code null}) is passed instead, the {@code Preconditions} method throws an
 * unchecked exception,
 * which helps the calling method communicate to <i>its</i> caller that
 * <i>that</i> caller has made
 * a mistake. Example:
 * 
 * <pre>   {@code
 *
 *   /**
 *    * Returns the positive square root of the given value.
 *    *
 *    * @throws BusinessAssertException if the value is negative
 *    *}{@code /
 *   public static double sqrt(double value) {
 *     Preconditions.checkArgument(value >= 0.0, "negative value: %s", value);
 *     // calculate the square root
 *   }
 *
 *   void exampleBadCaller() {
 *     double d = sqrt(-1.0);
 *   }}</pre>
 * <p>
 * In this example, {@code checkArgument} throws an
 * {@code BusinessAssertException} to indicate
 * that {@code exampleBadCaller} made an error in <i>its</i> call to
 * {@code sqrt}.
 *
 * <h3>Warning about performance</h3>
 *
 * <p>
 * The goal of this class is to improve readability of code, but in some
 * circumstances this may
 * come at a significant performance cost. Remember that parameter values for
 * message construction
 * must all be computed eagerly, and autoboxing and varargs array creation may
 * happen as well, even
 * when the precondition check then succeeds (as it should almost always do in
 * production). In some
 * circumstances these wasted CPU cycles and allocations can add up to a real
 * problem.
 * Performance-sensitive precondition checks can always be converted to the
 * customary form:
 * 
 * <pre>   {@code
 *
 * if (value < 0.0) {
 *     throw new BusinessAssertException("negative value: " + value);
 * }
 * }</pre>
 *
 * <h3>Other types of preconditions</h3>
 *
 * <p>
 * Not every type of precondition failure is supported by these methods.
 * Continue to throw
 * standard JDK exceptions such as {@link java.util.NoSuchElementException} or
 * {@link
 * UnsupportedOperationException} in the situations they are intended for.
 *
 * <h3>Non-preconditions</h3>
 *
 * <p>
 * It is of course possible to use the methods of this class to check for
 * invalid conditions
 * which are <i>not the caller's fault</i>. Doing so is <b>not recommended</b>
 * because it is
 * misleading to future readers of the code and of stack traces. See
 * <a href=
 * "http://code.google.com/p/guava-libraries/wiki/ConditionalFailuresExplained">Conditional
 * failures explained</a> in the Guava User Guide for more advice.
 *
 * <h3>{@code java.util.Objects.requireNonNull()}</h3>
 *
 * <p>
 * Projects which use {@code com.google.common} should generally avoid the use
 * of {@link
 * java.util.Objects#requireNonNull(Object)}. Instead, use whichever of {@link
 * #checkNotNull(Object)} or {@link Verify#verifyNotNull(Object)} is appropriate
 * to the situation.
 * (The same goes for the message-accepting overloads.)
 *
 * <h3>Only {@code %s} is supported</h3>
 *
 * <p>
 * In {@code Preconditions} error message template strings, only the
 * {@code "%s"} specifier is
 * supported, not the full range of {@link java.util.Formatter} specifiers.
 * However, note that if
 * the number of arguments does not match the number of occurrences of
 * {@code "%s"} in the format
 * string, {@code Preconditions} will still behave as expected, and will still
 * include all argument
 * values in the error message; the message will simply not be formatted exactly
 * as intended.
 *
 * <h3>More information</h3>
 *
 * <p>
 * See the Guava User Guide on
 * <a href=
 * "http://code.google.com/p/guava-libraries/wiki/PreconditionsExplained">using
 * {@code
 * Preconditions}</a>.
 *
 * @author Kevin Bourrillion
 * @since 2.0 (imported from Google Collections Library)
 */
@GwtCompatible
public final class P {
    private P() {
    }

    /**
     * Ensures the truth of an expression involving one or more parameters to the
     * calling method.
     *
     * @param expression a boolean expression
     * @throws BusinessAssertException if {@code expression} is false
     */
    public static void checkArgument(boolean expression) {
        if (!expression) {
            throw new BusinessAssertException();
        }
    }

    /**
     * Ensures the truth of an expression involving one or more parameters to the
     * calling method.
     *
     * @param expression   a boolean expression
     * @param errorMessage the exception message to use if the check fails; will be
     *                     converted to a
     *                     string using {@link String#valueOf(Object)}
     * @throws BusinessAssertException if {@code expression} is false
     */
    public static void checkArgument(boolean expression, @Nullable Object errorMessage) {
        if (!expression) {
            throw new BusinessAssertException(String.valueOf(errorMessage));
        }
    }

    /**
     * Ensures the truth of an expression involving one or more parameters to the
     * calling method.
     *
     * @param expression           a boolean expression
     * @param errorMessageTemplate a template for the exception message should the
     *                             check fail. The
     *                             message is formed by replacing each {@code %s}
     *                             placeholder in the template with an
     *                             argument. These are matched by position - the
     *                             first {@code %s} gets {@code
     *                             errorMessageArgs[0]}, etc. Unmatched arguments
     *                             will be appended to the formatted message
     *                             in square braces. Unmatched placeholders will be
     *                             left as-is.
     * @param errorMessageArgs     the arguments to be substituted into the message
     *                             template. Arguments
     *                             are converted to strings using
     *                             {@link String#valueOf(Object)}.
     * @throws BusinessAssertException if {@code expression} is false
     * @throws BusinessAssertException if the check fails and either
     *                                 {@code errorMessageTemplate} or
     *                                 {@code errorMessageArgs} is null (don't let
     *                                 this happen)
     */
    public static void checkArgument(boolean expression,
            @Nullable String errorMessageTemplate,
            @Nullable Object... errorMessageArgs) {
        if (!expression) {
            throw new BusinessAssertException(format(errorMessageTemplate, errorMessageArgs));
        }
    }

    /**
     * Ensures the truth of an expression involving the state of the calling
     * instance, but not
     * involving any parameters to the calling method.
     *
     * @param expression a boolean expression
     * @throws BusinessAssertException if {@code expression} is false
     */
    public static void checkState(boolean expression) {
        if (!expression) {
            throw new BusinessAssertException();
        }
    }

    /**
     * Ensures the truth of an expression involving the state of the calling
     * instance, but not
     * involving any parameters to the calling method.
     *
     * @param expression   a boolean expression
     * @param errorMessage the exception message to use if the check fails; will be
     *                     converted to a
     *                     string using {@link String#valueOf(Object)}
     * @throws BusinessAssertException if {@code expression} is false
     */
    public static void checkState(boolean expression, @Nullable Object errorMessage) {
        if (!expression) {
            throw new BusinessAssertException(String.valueOf(errorMessage));
        }
    }

    /**
     * Ensures the truth of an expression involving the state of the calling
     * instance, but not
     * involving any parameters to the calling method.
     *
     * @param expression           a boolean expression
     * @param errorMessageTemplate a template for the exception message should the
     *                             check fail. The
     *                             message is formed by replacing each {@code %s}
     *                             placeholder in the template with an
     *                             argument. These are matched by position - the
     *                             first {@code %s} gets {@code
     *                             errorMessageArgs[0]}, etc. Unmatched arguments
     *                             will be appended to the formatted message
     *                             in square braces. Unmatched placeholders will be
     *                             left as-is.
     * @param errorMessageArgs     the arguments to be substituted into the message
     *                             template. Arguments
     *                             are converted to strings using
     *                             {@link String#valueOf(Object)}.
     * @throws BusinessAssertException if {@code expression} is false
     * @throws BusinessAssertException if the check fails and either
     *                                 {@code errorMessageTemplate} or
     *                                 {@code errorMessageArgs} is null (don't let
     *                                 this happen)
     */
    public static void checkState(boolean expression,
            @Nullable String errorMessageTemplate,
            @Nullable Object... errorMessageArgs) {
        if (!expression) {
            throw new BusinessAssertException(format(errorMessageTemplate, errorMessageArgs));
        }
    }

    /**
     * Ensures that an object reference passed as a parameter to the calling method
     * is not null.
     *
     * @param reference an object reference
     * @return the non-null reference that was validated
     * @throws BusinessAssertException if {@code reference} is null
     */
    public static <T> T checkNotNull(T reference) {
        if (reference == null) {
            throw new BusinessAssertException();
        }
        return reference;
    }

    /**
     * Ensures that an object reference passed as a parameter to the calling method
     * is not null.
     *
     * @param reference    an object reference
     * @param errorMessage the exception message to use if the check fails; will be
     *                     converted to a
     *                     string using {@link String#valueOf(Object)}
     * @return the non-null reference that was validated
     * @throws BusinessAssertException if {@code reference} is null
     */
    public static <T> T checkNotNull(T reference, @Nullable Object errorMessage) {
        if (reference == null) {
            throw new BusinessAssertException(String.valueOf(errorMessage));
        }
        return reference;
    }

    /**
     * Ensures that an object reference passed as a parameter to the calling method
     * is not null.
     *
     * @param reference            an object reference
     * @param errorMessageTemplate a template for the exception message should the
     *                             check fail. The
     *                             message is formed by replacing each {@code %s}
     *                             placeholder in the template with an
     *                             argument. These are matched by position - the
     *                             first {@code %s} gets {@code
     *                             errorMessageArgs[0]}, etc. Unmatched arguments
     *                             will be appended to the formatted message
     *                             in square braces. Unmatched placeholders will be
     *                             left as-is.
     * @param errorMessageArgs     the arguments to be substituted into the message
     *                             template. Arguments
     *                             are converted to strings using
     *                             {@link String#valueOf(Object)}.
     * @return the non-null reference that was validated
     * @throws BusinessAssertException if {@code reference} is null
     */
    public static <T> T checkNotNull(T reference,
            @Nullable String errorMessageTemplate,
            @Nullable Object... errorMessageArgs) {
        if (reference == null) {
            // If either of these parameters is null, the right thing happens anyway
            throw new BusinessAssertException(format(errorMessageTemplate, errorMessageArgs));
        }
        return reference;
    }

    /*
     * All recent hotspots (as of 2009) *really* like to have the natural code
     *
     * if (guardExpression) {
     * throw new BadException(messageExpression);
     * }
     *
     * refactored so that messageExpression is moved to a separate String-returning
     * method.
     *
     * if (guardExpression) {
     * throw new BadException(badMsg(...));
     * }
     *
     * The alternative natural refactorings into void or Exception-returning methods
     * are much slower.
     * This is a big deal - we're talking factors of 2-8 in microbenchmarks, not
     * just 10-20%. (This
     * is a hotspot optimizer bug, which should be fixed, but that's a separate, big
     * project).
     *
     * The coding pattern above is heavily used in java.util, e.g. in ArrayList.
     * There is a
     * RangeCheckMicroBenchmark in the JDK that was used to test this.
     *
     * But the methods in this class want to throw different exceptions, depending
     * on the args, so it
     * appears that this pattern is not directly applicable. But we can use the
     * ridiculous, devious
     * trick of throwing an exception in the middle of the construction of another
     * exception. Hotspot
     * is fine with that.
     */

    /**
     * Ensures that {@code index} specifies a valid <i>element</i> in an array, list
     * or string of size
     * {@code size}. An element index may range from zero, inclusive, to
     * {@code size}, exclusive.
     *
     * @param index a user-supplied index identifying an element of an array, list
     *              or string
     * @param size  the size of that array, list or string
     * @return the value of {@code index}
     * @throws BusinessAssertException if {@code index} is negative or is not less
     *                                 than {@code size}
     * @throws BusinessAssertException if {@code size} is negative
     */
    public static int checkElementIndex(int index, int size) {
        return checkElementIndex(index, size, "index");
    }

    /**
     * Ensures that {@code index} specifies a valid <i>element</i> in an array, list
     * or string of size
     * {@code size}. An element index may range from zero, inclusive, to
     * {@code size}, exclusive.
     *
     * @param index a user-supplied index identifying an element of an array, list
     *              or string
     * @param size  the size of that array, list or string
     * @param desc  the text to use to describe this index in an error message
     * @return the value of {@code index}
     * @throws BusinessAssertException if {@code index} is negative or is not less
     *                                 than {@code size}
     * @throws BusinessAssertException if {@code size} is negative
     */
    public static int checkElementIndex(
            int index, int size, @Nullable String desc) {
        // Carefully optimized for execution by hotspot (explanatory comment above)
        if (index < 0 || index >= size) {
            throw new BusinessAssertException(badElementIndex(index, size, desc));
        }
        return index;
    }

    private static String badElementIndex(int index, int size, String desc) {
        if (index < 0) {
            return format("%s (%s) must not be negative", desc, index);
        } else if (size < 0) {
            throw new BusinessAssertException("negative size: " + size);
        } else { // index >= size
            return format("%s (%s) must be less than size (%s)", desc, index, size);
        }
    }

    /**
     * Ensures that {@code index} specifies a valid <i>position</i> in an array,
     * list or string of
     * size {@code size}. A position index may range from zero to {@code size},
     * inclusive.
     *
     * @param index a user-supplied index identifying a position in an array, list
     *              or string
     * @param size  the size of that array, list or string
     * @return the value of {@code index}
     * @throws BusinessAssertException if {@code index} is negative or is greater
     *                                 than {@code size}
     * @throws BusinessAssertException if {@code size} is negative
     */
    public static int checkPositionIndex(int index, int size) {
        return checkPositionIndex(index, size, "index");
    }

    /**
     * Ensures that {@code index} specifies a valid <i>position</i> in an array,
     * list or string of
     * size {@code size}. A position index may range from zero to {@code size},
     * inclusive.
     *
     * @param index a user-supplied index identifying a position in an array, list
     *              or string
     * @param size  the size of that array, list or string
     * @param desc  the text to use to describe this index in an error message
     * @return the value of {@code index}
     * @throws BusinessAssertException if {@code index} is negative or is greater
     *                                 than {@code size}
     * @throws BusinessAssertException if {@code size} is negative
     */
    public static int checkPositionIndex(int index, int size, @Nullable String desc) {
        // Carefully optimized for execution by hotspot (explanatory comment above)
        if (index < 0 || index > size) {
            throw new BusinessAssertException(badPositionIndex(index, size, desc));
        }
        return index;
    }

    private static String badPositionIndex(int index, int size, String desc) {
        if (index < 0) {
            return format("%s (%s) must not be negative", desc, index);
        } else if (size < 0) {
            throw new BusinessAssertException("negative size: " + size);
        } else { // index > size
            return format("%s (%s) must not be greater than size (%s)", desc, index, size);
        }
    }

    /**
     * Ensures that {@code start} and {@code end} specify a valid <i>positions</i>
     * in an array, list
     * or string of size {@code size}, and are in order. A position index may range
     * from zero to
     * {@code size}, inclusive.
     *
     * @param start a user-supplied index identifying a starting position in an
     *              array, list or string
     * @param end   a user-supplied index identifying a ending position in an array,
     *              list or string
     * @param size  the size of that array, list or string
     * @throws BusinessAssertException if either index is negative or is greater
     *                                 than {@code size},
     *                                 or if {@code end} is less than {@code start}
     * @throws BusinessAssertException if {@code size} is negative
     */
    public static void checkPositionIndexes(int start, int end, int size) {
        // Carefully optimized for execution by hotspot (explanatory comment above)
        if (start < 0 || end < start || end > size) {
            throw new BusinessAssertException(badPositionIndexes(start, end, size));
        }
    }

    private static String badPositionIndexes(int start, int end, int size) {
        if (start < 0 || start > size) {
            return badPositionIndex(start, size, "start index");
        }
        if (end < 0 || end > size) {
            return badPositionIndex(end, size, "end index");
        }
        // end < start
        return format("end index (%s) must not be less than start index (%s)", end, start);
    }

    /**
     * Substitutes each {@code %s} in {@code template} with an argument. These are
     * matched by
     * position: the first {@code %s} gets {@code args[0]}, etc. If there are more
     * arguments than
     * placeholders, the unmatched arguments will be appended to the end of the
     * formatted message in
     * square braces.
     *
     * @param template a non-null string containing 0 or more {@code %s}
     *                 placeholders.
     * @param args     the arguments to be substituted into the message template.
     *                 Arguments are converted
     *                 to strings using {@link String#valueOf(Object)}. Arguments
     *                 can be null.
     */
    // Note that this is somewhat-improperly used from Verify.java as well.
    static String format(String template, @Nullable Object... args) {
        template = String.valueOf(template); // null -> "null"

        // start substituting the arguments into the '%s' placeholders
        StringBuilder builder = new StringBuilder(template.length() + 16 * args.length);
        int templateStart = 0;
        int i = 0;
        while (i < args.length) {
            int placeholderStart = template.indexOf("%s", templateStart);
            if (placeholderStart == -1) {
                break;
            }
            builder.append(template.substring(templateStart, placeholderStart));
            builder.append(args[i++]);
            templateStart = placeholderStart + 2;
        }
        builder.append(template.substring(templateStart));

        // if we run out of placeholders, append the extra args in square braces
        if (i < args.length) {
            builder.append(" [");
            builder.append(args[i++]);
            while (i < args.length) {
                builder.append(", ");
                builder.append(args[i++]);
            }
            builder.append(']');
        }

        return builder.toString();
    }

    public static void throwBusinessException(@Nullable Object errorMessage) {
        throw new BusinessAssertException(String.valueOf(errorMessage));
    }

    public static void throwBusinessException(@Nullable CharSequence errorMessage, Object... params) {
        throw new BusinessAssertException(StrUtil.format(errorMessage, params));
    }
}
